These microwavable steel food boxes are leak proof, dishwasher and oven-safe, and are available in two sizes for breakfast, lunch, and everything in between. Lightweight, airtight and durable, they are perfect for meal prep, food storage, or simply eating on-the-go.  Innovative microwave-safe steel box (see FAQs for more info) Leak proof + airtight vacuum-sealed lid lock keeps food fresher for longer Easy storage: boxes and lids are stackable Semi-transparent lid to see your meals clearly High quality stainless steel Dishwasher-safe/Oven-safe(exc. lid)/Freezer-safe Easy-clean: fully removable seals High performance: lid lock vent means lid can stay on when microwaving which reduces heat time (compared with other stainless steel containers), and prevents splattering  Multifunction: meal prep, food storage, on-the-go lunch box, oven container BPA-Free This set includes 3x Square Meal Prep Boxes (Small: 37 fl oz, Large: 47 fl oz)